<?php

/*
 * Pickle
 *
 *
 * @license
 *
 * New BSD License
 *
 * Copyright © 2015-2015, Pickle community. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Hoa nor the names of its contributors may be
 *       used to endorse or promote products derived from this software without
 *       specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

namespace Pickle\Base\Archive;

use RuntimeException;

abstract class Infozip
{
    private const FILE_SIGNATURE = "PK\x03\x04";

    /**
     * The path (already normalized for the current OS).
     *
     * @var string
     */
    protected $path;

    protected function __construct(string $path)
    {
        $this->path = str_replace('/', DIRECTORY_SEPARATOR, $path);
    }

    protected function checkExisting(): void
    {
        if (!is_file($this->path)) {
            throw new RuntimeException("Unable to find the file {$this->path}");
        }
        if (!is_readable($this->path)) {
            throw new RuntimeException("The ZIP archive {$this->path} is not readable");
        }
        $fd = fopen($this->path, 'rb');
        if (!$fd) {
            throw new RuntimeException("Failed to open the ZIP archive {$this->path}");
        }
        try {
            $signature = fread($fd, strlen(self::FILE_SIGNATURE));
            if ($signature !== self::FILE_SIGNATURE) {
                throw new RuntimeException("The file {$this->path} doesn't seems a valid ZIP archive");
            }
        } finally {
            fclose($fd);
        }
    }

    protected function run(string $command, array $args)
    {
        $commandLine = $command . ' ' . implode(' ', $args) . ' 2>&1';
        $output = [];
        $rc = -1;
        exec($commandLine, $output, $rc);
        if ($rc !== 0) {
            throw new RuntimeException(trim(implode("\n", $output)) ?: "{$command} command failed");
        }
    }
}

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